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<?php function foo() { echo 'In generator func foo',"\n"; if ($string == 'Hello world!') { $string = (yield); echo $string; } for ($i = 1; $i <= 3; $i++) { yield $i; } echo 'done de dun',"\n"; return; } $generator = foo(); foreach ($generator as $value) echo "$value\n"; $generator->send('Hello world!');
Output for git.master, git.master_jit, rfc.property-hooks
In generator func foo Warning: Undefined variable $string in /in/A8ZeT on line 4 1 2 3 done de dun

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